Refer to the figure below, which shows a pedigree of a sex-linked recessive trait. Note that only shaded individuals are affected; unshaded individuals may or may not be carriers. Consider the affected son of female number II-6. If individual III-6 wants to marry and his partner does not carry the allele, the probability that his first son will be affected with the trait is ? percent. 1. 100 2. 50 3. 25 4. 0 5. 75

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.